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Dear Heloise: I enjoy your travel suggestions, but I have one more thing to add to your carry-on bag: food. Years ago, we took a trip to a small island in the Caribbean, but with all the switching of planes, delays and lost luggage, we didn’t get to our hotel until 2 a.m., and everything was closed. After 22 hours of travel, we had one breadstick to share between us. We still laugh about it, but now we travel with some packaged food in our carry-on bags, even if it’s only energy bars. — Marie M., via email